openjpeg/NEWS.md

OpenJPEG NEWS

More details in the Changelog

OpenJPEG 2.2.0

No API/ABI break compared to v2.1.2 but additional symbols for multithreading support (hence the MINOR version bump).

Codebase improvements

• Memory consumption reduction at decoding side #968
• Multi-threading support at decoding side #786
• Tier-1 speed optimizations (encoder and decoder) #945
• Tier-1 decoder further optimization #783
• Inverse 5x3 DWT speed optimization: single-pass lifting and SSE2/AVX2 implementation #957
• Fixed a bug that prevented OpenJPEG to compress losslessly in some situations #949
• Fixed BYPASS/LAZY, RESTART/TERMALL and PTERM mode switches
• Many other bug fixes (including security fixes)

Maintenance improvements

• Benchmarking scripts to automatically compare the speed of latest OpenJPEG build with latest release and/or Kakadu binaries #917
• CPU and RAM usage profiling scripts #918
• Codebase reformatting (with astyle) and scripts to automatically check that new commits comply with formatting guidelines #919
• Register OpenJPEG at Google OSS Fuzz initiative, so as to automatically have OpenJPEG tested against Google fuzzer #965

OpenJPEG 2.1.2

• Bug fixes (including security fixes)
• No API/ABI break compared to v2.1.1

OpenJPEG 2.1.1

• Huge amount of critical bugfixes
• Speed improvements
• No API/ABI break compared to v2.1

OpenJPEG 2.1.0

New Features

* Digital Cinema profiles have been fixed and updated
* New option to disable MCT if needed
* extended RAW support: it is now possible to input raw images
  with subsampled color components (422, 420, etc)
* New way to deal with profiles

API/ABI modifications

(see here for details)

* Removed deprecated functions 
    * opj_stream_create_default_file_stream(FILE*,...)
    * opj_stream_create_file_stream(FILE*,...)
    * opj_stream_set_user_data (opj_stream_t* p_stream, void * p_data)
* Added 
    * opj_stream_create_default_file_stream(char*,...)
    * opj_stream_create_file_stream(char*,...)
    * opj_stream_destroy(opj_stream_t*)
    * opj_stream_set_user_data (opj_stream_t* p_stream, void * p_data, 
        ... opj_stream_free_user_data_fn p_function)
    * JPEG 2000 profiles and Part-2 extensions defined through '#define'
* Changed
    * 'alpha' field added to 'opj_image_comp' structure
    * 'OPJ_CLRSPC_EYCC' added to enum COLOR_SPACE
    * 'OPJ_CLRSPC_CMYK' added to enum COLOR_SPACE
    * 'OPJ_CODEC_JPP' and 'OPJ_CODEC_JPX' added to CODEC_FORMAT
      (not yet used in use)
    * 'max_cs_size' and 'rsiz' fields added to opj_cparameters_t

Misc

* OpenJPEG is now officially conformant with JPEG 2000 Part-1
  and will soon become official reference software at the 
  JPEG committee.
* Huge amount of bug fixes. See CHANGES for details.

OpenJPEG 2.0.0

New Features

* streaming capabilities
* merge JP3D

API modifications

(see here for details)

* Use a 64bits capable API

Misc

* removed autotools build system
* folders hierarchies reorganisation
* Huge amount of bug fixes. See CHANGES for details.